I don´t really understand what you´re asking...or why?
Your website has plenty of fine studio shots...yours? If so, then why are you asking us what you seem to know (or should) already.
By "depth" I guess you mean depth-of-field...do some testing with whatever you have and the aperture f-stops. Up fairly close, it´s (basically) just a matter of the angle of the lens and the f-stop.
If you are looking for something extremely professional (and different), you could consider middle or large-formant with it´s tilt and shift facilities, or consider the software from Helicon Focus (c. 50) which can seamlessly blend shots with the focus set at different points...to make things appear to have incredible depth...